QUESTION IMAGE
Question
j is the midpoint of \\( \overline { f h } \\) and \\( \overline { g i } \\). complete the proof that \\( \triangle f i j \cong \triangle h g j \\).
1 j is the midpoint of \\( \overline { f h } \\) given
2 j is the midpoint of \\( \overline { g i } \\) given
3 \\( \overline { g h } \cong \overline { f i } \\) given
4 \\( \overline { f j } \cong \overline { h j } \\) definition of midpoint
5 \\( \overline { g j } \cong \overline { i j } \\) definition of midpoint
6 \\( \triangle f i j \cong \triangle h g j \\) cpctc definition of congruence sas sss
Step1: Identify the congruent sides
From statements 4 ($\overline{FJ}\cong\overline{HJ}$) and 5 ($\overline{GJ}\cong\overline{IJ}$), and given $\overline{GH}\cong\overline{FI}$ (statement 3).
Step2: Use the SAS (Side - Angle - Side) congruence criterion
In $\triangle FIJ$ and $\triangle HGJ$, we have two pairs of congruent sides ($\overline{FJ}\cong\overline{HJ}$ and $\overline{GJ}\cong\overline{IJ}$) and the included angles (the vertical angles at $J$ are congruent). By the SAS (Side - Angle - Side) congruence criterion, $\triangle FIJ\cong\triangle HGJ$.
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